Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit and Third-Party Guarantees As of June 30, 2023 and March 31, 2023, the Company was contingently liable under open standby letters of credit and bank guarantees issued by our banks in favor of third parties that totaled $4.4 million and $6.1 million, respectively. These letters of credit and bank guarantees primarily support insurance and bid and performance obligations. At both June 30, 2023 and March 31, 2023, approximately $1.3 million of these instruments reduced the available borrowings under the Revolving Credit Facility. The remainder is guaranteed under a separate $7.5 million facility of which $4.4 million and $2.7 million were available to the Company at June 30, 2023 and March 31, 2023, respectively. Government Contracting Matters - Provision for Claimed Indirect Costs For the three months ended June 30, 2023 and 2022, approximately 98% and 97%, respectively, of the Company's revenue was generated from contracts where the end user was an agency or department of the U.S. government, including contracts where the Company performed either as a prime contractor or subcontractor, and regardless of the geographic location in which the work was performed. As noted in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2023, in the ordinary course of business, agencies of the U.S. government, including the Defense Contract Audit Agency (DCAA), audit the Company’s claimed indirect costs and conduct inquiries and investigations of our business practices with respect to government contracts to determine whether the Company's operations are conducted in accordance with these requirements and the terms of the relevant contracts. Management believes it has recorded the appropriate provision for claimed indirect costs for any audit, inquiry, or investigation of which it is aware that may be subject to any reductions and/or penalties. As of June 30, 2023 and March 31, 2023, the Company had recorded liabilities of approximately $333.4 million and $326.7 million, respectively, for estimated adjustments to claimed indirect costs based on its historical DCAA audit results, including the final resolution of such audits with the Defense Contract Management Agency, for claimed indirect costs incurred subsequent to fiscal 2011, and for contracts not yet closed that are subject to audit and final resolution. Litigation Our performance under U.S. government contracts and compliance with the terms of those contracts and applicable laws and regulations are subject to continuous audit, review, and investigation by the U.S. government, which may include such investigative techniques as subpoenas or civil investigative demands. Given the nature of our business, these audits, reviews, and investigations may focus, among other areas, on various aspects of procurement integrity, labor time reporting, sensitive and/or classified information access and control, executive compensation, and post government employment restrictions. We are not always aware of our status in such matters, but we are currently aware of certain pending audits and investigations involving labor time reporting, procurement integrity, and classified information access. In addition, from time to time, we are also involved in legal proceedings and investigations arising in the ordinary course of business, including those relating to employment matters, relationships with clients and contractors, intellectual property disputes, and other business matters. These legal proceedings seek various remedies, including claims for monetary damages in varying amounts, none of which are considered material, or are unspecified as to amount. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, we do not expect any of the currently ongoing audits, reviews, investigations, or litigation to have a material adverse effect on our financial condition and results of operations. As of June 30, 2023 and March 31, 2023, there were no material amounts accrued in the condensed consolidated financial statements related to these proceedings. As previously disclosed in Note 20, “Commitments and Contingencies,” to the consolidated financial statements of the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2023, the Company is not able to reasonably estimate the expected amount or range of cost or any loss associated with these matters. On June 7, 2017, Booz Allen Hamilton was informed that the U.S. Department of Justice (“DOJ”) was conducting a civil and criminal investigation of the Company. In connection with the investigation, the DOJ requested information from the Company relating to certain elements of the Company’s cost accounting and indirect cost charging practices with the U.S. government. The investigation resulted from a qui tam lawsuit filed on or about September 26, 2016 in the United States District Court for the District of Columbia pursuant to the qui tam provisions of the civil False Claims Act (the “Civil Action”), which lawsuit was under judicial seal until July 21, 2023. After learning of the investigation, the Company engaged a law firm experienced in these matters to represent the Company in connection with this matter and respond to the government's requests. As is commonly the case with this type of matter, the Company was also contacted by other regulatory agencies and bodies, including the SEC, which notified the Company that it was conducting an investigation that the Company believes related to the matters that were also the subject of the DOJ's investigation. On May 12, 2021, the Company was informed that the DOJ closed its criminal investigation. On July 21, 2023, the Company entered into a Settlement Agreement (the “Settlement Agreement”) with the United States of America, acting through the DOJ and on behalf of the Department of Defense and Defense Contract Management Agency (collectively the “United States”), and Relator Sarah A. Feinberg, to resolve the DOJ’s civil investigation and the Civil Action. The Company entered into the Settlement Agreement to avoid the delay, uncertainty and expense of protracted litigation. The Settlement Agreement contains no admission of liability by the Company. Under the terms of the Settlement Agreement, the Company agreed to pay to the United States $377.5 million (the “Settlement Amount”), which the Company accrued as a reserve for this matter as of June 30, 2023. The Company paid the Settlement Amount with cash on hand and by drawing on its revolving credit facility. The Company had previously recorded a $350.0 million reserve relating to this investigation and had previously disclosed that it believed the range of reasonably possible loss in connection with the investigation to be between $350 million and $378 million. Following the United States’ receipt of the Settlement Amount, the Company was released from any civil or administrative monetary claims under the civil False Claims Act and other specified civil statutes and common law theories of liability for certain elements of the Company’s cost accounting and indirect cost charging practices from April 1, 2011 through March 31, 2021, and the claim brought in the Civil Action was dismissed with prejudice. On July 27, 2023, the Company was informed that the SEC concluded its investigation without recommending an enforcement action.